. wow. hc. why should they give yellow? now, you mix red and green paint. you get, like, brown, okay? [laughter] but that's color by subtraction. read the chapter on that. here we have light on top of light. and red and green hitting your eye at the same time, gonna give you what? - yellow. - yellow. why? --primary--between the two. that's right. yellow is right between the two. and these are gonna average out to be that, okay? isn't that nice? isn't that neat, gang? anyway, yellow--it's-- oh, look at this. we talked about three colors, red, green and blue adding to give white. is there such a thing as two colors adding together to give white? answer end with a p. yup. nope. no. try it. nope. nope. no, not a pe. just a p. - yup. - yup. yup. okay. it turns out two colors can give white. can anyone tell me what color mixed with blue will give white? - yellow. - yellow. do you see it? yeah. how many can't reason this? well, the yellow is the red and the green, huh? okay. well, let me ask this, what color--red and what color will equal white? cyan. - bluish green. - cyan. this color here